Yes, he did.
Probably, but that is the price one pays for accepting command. If he, and you using your argument, are willing to take the kudos when things go right, largely because of your subordinates, then the reverse should be true as well. You are responsible for the actions, particularly the duty-related ones, for those under your command. Why did people under his supervision lose a box of grenades and why is a weapon missing? In North Dakota? Especially the gun. Those are accounted for so many times it's not even funny. Yet this one wasn't discovered until another goof caused an inventory.
If his people didn't either respect, best case, or fear, worst case, him and do the things they are supposed to do, then that is on him. He did not lead/train his subordinates who, in turn, let this happen.
Gutless AF leadership? Yep. Wheels are round as well.
Throwing people under the bus? Said bus uses those round wheels.
Nope.